Recently I have been experiencing an issue with going to new posts in threads: sometimes, but not always, and with very different threads, instead of taking me to the next unread post it takes me to a post in mid-March. For the slower threads this is not a problem, but in some of the threads March was hundreds of pages ago. Since I usually visit the forum on my phone, I thought at first that I was being clumsy and clicking the wrong button by mistake, but after carefully zooming and clicking, I don't believe this is the case. I closed and reopened the browser in case it was a caching issue but that didn't change anything.